I'm thinking about getting a 2017 Q30 2.2 auto. I spend all day on the motorway cruising at 70mph with cruise control on. Any idea on what sort of mpg I could expect ? Need at least 50 to make it work financially.
I think you may get high 40's with the big 2.1 mercedes diesel, definitely high 50's with the 1.5 eco diesel. If you get the radar cruise and the DCT it'll do it's best to get excellent MPG as it will keep a safe distance behind the car in front and change gear too.